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[src/trunk]: src/tests/kernel Switch back arch/amd64/t_ptrace_wait.c to r1.6 ...
details: https://anonhg.NetBSD.org/src/rev/408d8a15f242
branches: trunk
changeset: 821758:408d8a15f242
user: kamil <kamil%NetBSD.org@localhost>
date: Thu Feb 16 15:57:45 2017 +0000
description:
Switch back arch/amd64/t_ptrace_wait.c to r1.6 and restore original DBREGS
This is preparation to replace watchpoint API to dbregs.
Sponsored by <The NetBSD Foundation>
diffstat:
tests/kernel/arch/amd64/t_ptrace_wait.c | 1837 ++++++++++++++++--------------
tests/kernel/t_ptrace_wait.h | 8 +-
2 files changed, 1008 insertions(+), 837 deletions(-)
diffs (truncated from 2343 to 300 lines):
diff -r 4943effb075f -r 408d8a15f242 tests/kernel/arch/amd64/t_ptrace_wait.c
--- a/tests/kernel/arch/amd64/t_ptrace_wait.c Thu Feb 16 15:00:30 2017 +0000
+++ b/tests/kernel/arch/amd64/t_ptrace_wait.c Thu Feb 16 15:57:45 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: t_ptrace_wait.c,v 1.11 2017/01/18 05:14:34 kamil Exp $ */
+/* $NetBSD: t_ptrace_wait.c,v 1.12 2017/02/16 15:57:45 kamil Exp $ */
/*-
* Copyright (c) 2016 The NetBSD Foundation, Inc.
@@ -27,7 +27,7 @@
*/
#include <sys/cdefs.h>
-__RCSID("$NetBSD: t_ptrace_wait.c,v 1.11 2017/01/18 05:14:34 kamil Exp $");
+__RCSID("$NetBSD: t_ptrace_wait.c,v 1.12 2017/02/16 15:57:45 kamil Exp $");
#include <sys/param.h>
#include <sys/types.h>
@@ -37,7 +37,6 @@
#include <sys/sysctl.h>
#include <sys/wait.h>
#include <machine/reg.h>
-#include <x86/dbregs.h>
#include <err.h>
#include <errno.h>
#include <sched.h>
@@ -50,11 +49,41 @@
#include <atf-c.h>
-#include "h_macros.h"
+#include "../../../h_macros.h"
#include "../../t_ptrace_wait.h"
+union u {
+ long raw;
+ struct {
+ long local_dr0_breakpoint : 1; /* 0 */
+ long global_dr0_breakpoint : 1; /* 1 */
+ long local_dr1_breakpoint : 1; /* 2 */
+ long global_dr1_breakpoint : 1; /* 3 */
+ long local_dr2_breakpoint : 1; /* 4 */
+ long global_dr2_breakpoint : 1; /* 5 */
+ long local_dr3_breakpoint : 1; /* 6 */
+ long global_dr3_breakpoint : 1; /* 7 */
+ long local_exact_breakpt : 1; /* 8 */
+ long global_exact_breakpt : 1; /* 9 */
+ long reserved_10 : 1; /* 10 */
+ long rest_trans_memory : 1; /* 11 */
+ long reserved_12 : 1; /* 12 */
+ long general_detect_enable : 1; /* 13 */
+ long reserved_14 : 1; /* 14 */
+ long reserved_15 : 1; /* 15 */
+ long condition_dr0 : 2; /* 16-17 */
+ long len_dr0 : 2; /* 18-19 */
+ long condition_dr1 : 2; /* 20-21 */
+ long len_dr1 : 2; /* 22-23 */
+ long condition_dr2 : 2; /* 24-25 */
+ long len_dr2 : 2; /* 26-27 */
+ long condition_dr3 : 2; /* 28-29 */
+ long len_dr3 : 2; /* 30-31 */
+ } bits;
+};
+
#if defined(HAVE_GPREGS)
ATF_TC(regs1);
ATF_TC_HEAD(regs1, tc)
@@ -138,15 +167,74 @@
}
#endif
-#if defined(__HAVE_PTRACE_WATCHPOINTS)
-ATF_TC(watchpoint_count);
-ATF_TC_HEAD(watchpoint_count, tc)
+#if defined(HAVE_DBREGS)
+ATF_TC(dbregs_print);
+ATF_TC_HEAD(dbregs_print, tc)
{
atf_tc_set_md_var(tc, "descr",
- "Call PT_COUNT_WATCHPOINTS and assert four available watchpoints");
+ "Verify plain PT_GETDBREGS with printing Debug Registers");
}
-ATF_TC_BODY(watchpoint_count, tc)
+ATF_TC_BODY(dbregs_print, tc)
+{
+ const int exitval = 5;
+ const int sigval = SIGSTOP;
+ pid_t child, wpid;
+#if defined(TWAIT_HAVE_STATUS)
+ int status;
+#endif
+ struct dbreg r;
+ size_t i;
+
+ printf("Before forking process PID=%d\n", getpid());
+ ATF_REQUIRE((child = fork()) != -1);
+ if (child == 0) {
+ printf("Before calling PT_TRACE_ME from child %d\n", getpid());
+ FORKEE_ASSERT(ptrace(PT_TRACE_ME, 0, NULL, 0) != -1);
+
+ printf("Before raising %s from child\n", strsignal(sigval));
+ FORKEE_ASSERT(raise(sigval) == 0);
+
+ printf("Before exiting of the child process\n");
+ _exit(exitval);
+ }
+ printf("Parent process PID=%d, child's PID=%d\n", getpid(), child);
+
+ printf("Before calling %s() for the child\n", TWAIT_FNAME);
+ TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
+
+ validate_status_stopped(status, sigval);
+
+ printf("Call GETDBREGS for the child process\n");
+ ATF_REQUIRE(ptrace(PT_GETDBREGS, child, &r, 0) != -1);
+
+ printf("State of the debug registers:\n");
+ for (i = 0; i < __arraycount(r.dbregs); i++)
+ printf("r[%zu]=%#lx\n", i, r.dbregs[i]);
+
+ printf("Before resuming the child process where it left off and "
+ "without signal to be sent\n");
+ ATF_REQUIRE(ptrace(PT_CONTINUE, child, (void *)1, 0) != -1);
+
+ printf("Before calling %s() for the child\n", TWAIT_FNAME);
+ TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
+
+ validate_status_exited(status, exitval);
+
+ printf("Before calling %s() for the child\n", TWAIT_FNAME);
+ TWAIT_REQUIRE_FAILURE(ECHILD, wpid = TWAIT_GENERIC(child, &status, 0));
+}
+#endif
+
+#if defined(HAVE_DBREGS)
+ATF_TC(dbregs_preserve_dr0);
+ATF_TC_HEAD(dbregs_preserve_dr0, tc)
+{
+ atf_tc_set_md_var(tc, "descr",
+ "Verify that setting DR0 is preserved across ptrace(2) calls");
+}
+
+ATF_TC_BODY(dbregs_preserve_dr0, tc)
{
const int exitval = 5;
const int sigval = SIGSTOP;
@@ -154,7 +242,185 @@
#if defined(TWAIT_HAVE_STATUS)
int status;
#endif
- int N;
+ struct dbreg r1;
+ struct dbreg r2;
+ /* Number of available CPU Debug Registers on AMD64 */
+ const size_t len = 16;
+ size_t i;
+ int watchme;
+
+ printf("Assert that known number of Debug Registers (%zu) is valid\n",
+ len);
+ ATF_REQUIRE_EQ(__arraycount(r1.dbregs), len);
+ ATF_REQUIRE_EQ(__arraycount(r2.dbregs), len);
+
+ printf("Before forking process PID=%d\n", getpid());
+ ATF_REQUIRE((child = fork()) != -1);
+ if (child == 0) {
+ printf("Before calling PT_TRACE_ME from child %d\n", getpid());
+ FORKEE_ASSERT(ptrace(PT_TRACE_ME, 0, NULL, 0) != -1);
+
+ printf("Before raising %s from child\n", strsignal(sigval));
+ FORKEE_ASSERT(raise(sigval) == 0);
+
+ printf("Before exiting of the child process\n");
+ _exit(exitval);
+ }
+ printf("Parent process PID=%d, child's PID=%d\n", getpid(), child);
+
+ printf("Before calling %s() for the child\n", TWAIT_FNAME);
+ TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
+
+ validate_status_stopped(status, sigval);
+
+ printf("Call GETDBREGS for the child process (r1)\n");
+ ATF_REQUIRE(ptrace(PT_GETDBREGS, child, &r1, 0) != -1);
+
+ printf("State of the debug registers (r1):\n");
+ for (i = 0; i < __arraycount(r1.dbregs); i++)
+ printf("r1[%zu]=%#lx\n", i, r1.dbregs[i]);
+
+ r1.dbregs[0] = (long)(intptr_t)&watchme;
+ printf("Set DR0 (r1.dbregs[0]) to new value %#lx\n", r1.dbregs[0]);
+
+ printf("New state of the debug registers (r1):\n");
+ for (i = 0; i < __arraycount(r1.dbregs); i++)
+ printf("r1[%zu]=%#lx\n", i, r1.dbregs[i]);
+
+ printf("Call SETDBREGS for the child process (r1)\n");
+ ATF_REQUIRE(ptrace(PT_SETDBREGS, child, &r1, 0) != -1);
+
+ printf("Call GETDBREGS for the child process (r2)\n");
+ ATF_REQUIRE(ptrace(PT_GETDBREGS, child, &r2, 0) != -1);
+
+ printf("Assert that (r1) and (r2) are the same\n");
+ ATF_REQUIRE(memcmp(&r1, &r2, len) == 0);
+
+ printf("Before resuming the child process where it left off and "
+ "without signal to be sent\n");
+ ATF_REQUIRE(ptrace(PT_CONTINUE, child, (void *)1, 0) != -1);
+
+ printf("Before calling %s() for the child\n", TWAIT_FNAME);
+ TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
+
+ validate_status_exited(status, exitval);
+
+ printf("Before calling %s() for the child\n", TWAIT_FNAME);
+ TWAIT_REQUIRE_FAILURE(ECHILD, wpid = TWAIT_GENERIC(child, &status, 0));
+}
+#endif
+
+#if defined(HAVE_DBREGS)
+ATF_TC(dbregs_preserve_dr1);
+ATF_TC_HEAD(dbregs_preserve_dr1, tc)
+{
+ atf_tc_set_md_var(tc, "descr",
+ "Verify that setting DR1 is preserved across ptrace(2) calls");
+}
+
+ATF_TC_BODY(dbregs_preserve_dr1, tc)
+{
+ const int exitval = 5;
+ const int sigval = SIGSTOP;
+ pid_t child, wpid;
+#if defined(TWAIT_HAVE_STATUS)
+ int status;
+#endif
+ struct dbreg r1;
+ struct dbreg r2;
+ /* Number of available CPU Debug Registers on AMD64 */
+ const size_t len = 16;
+ size_t i;
+ int watchme;
+
+ printf("Assert that known number of Debug Registers (%zu) is valid\n",
+ len);
+ ATF_REQUIRE_EQ(__arraycount(r1.dbregs), len);
+ ATF_REQUIRE_EQ(__arraycount(r2.dbregs), len);
+
+ printf("Before forking process PID=%d\n", getpid());
+ ATF_REQUIRE((child = fork()) != -1);
+ if (child == 0) {
+ printf("Before calling PT_TRACE_ME from child %d\n", getpid());
+ FORKEE_ASSERT(ptrace(PT_TRACE_ME, 0, NULL, 0) != -1);
+
+ printf("Before raising %s from child\n", strsignal(sigval));
+ FORKEE_ASSERT(raise(sigval) == 0);
+
+ printf("Before exiting of the child process\n");
+ _exit(exitval);
+ }
+ printf("Parent process PID=%d, child's PID=%d\n", getpid(), child);
+
+ printf("Before calling %s() for the child\n", TWAIT_FNAME);
+ TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
+
+ validate_status_stopped(status, sigval);
+
+ printf("Call GETDBREGS for the child process (r1)\n");
+ ATF_REQUIRE(ptrace(PT_GETDBREGS, child, &r1, 0) != -1);
+
+ printf("State of the debug registers (r1):\n");
+ for (i = 0; i < __arraycount(r1.dbregs); i++)
+ printf("r1[%zu]=%#lx\n", i, r1.dbregs[i]);
+
+ r1.dbregs[1] = (long)(intptr_t)&watchme;
+ printf("Set DR1 (r1.dbregs[1]) to new value %#lx\n", r1.dbregs[1]);
+
+ printf("New state of the debug registers (r1):\n");
+ for (i = 0; i < __arraycount(r1.dbregs); i++)
+ printf("r1[%zu]=%#lx\n", i, r1.dbregs[i]);
+
+ printf("Call SETDBREGS for the child process (r1)\n");
+ ATF_REQUIRE(ptrace(PT_SETDBREGS, child, &r1, 0) != -1);
+
+ printf("Call GETDBREGS for the child process (r2)\n");
+ ATF_REQUIRE(ptrace(PT_GETDBREGS, child, &r2, 0) != -1);
+
+ printf("Assert that (r1) and (r2) are the same\n");
+ ATF_REQUIRE(memcmp(&r1, &r2, len) == 0);
+
+ printf("Before resuming the child process where it left off and "
+ "without signal to be sent\n");
+ ATF_REQUIRE(ptrace(PT_CONTINUE, child, (void *)1, 0) != -1);
+
+ printf("Before calling %s() for the child\n", TWAIT_FNAME);
+ TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
+
+ validate_status_exited(status, exitval);
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